diff options
| -rw-r--r-- | fs/xfs/xfs_buf_item.c | 4 | ||||
| -rw-r--r-- | fs/xfs/xfs_mount.c | 12 | ||||
| -rw-r--r-- | fs/xfs/xfs_mount.h | 2 | ||||
| -rw-r--r-- | fs/xfs/xfs_sysfs.c | 46 |
4 files changed, 64 insertions, 0 deletions
diff --git a/fs/xfs/xfs_buf_item.c b/fs/xfs/xfs_buf_item.c index 0d95c59f7c68..34257992934c 100644 --- a/fs/xfs/xfs_buf_item.c +++ b/fs/xfs/xfs_buf_item.c @@ -1106,6 +1106,10 @@ xfs_buf_iodone_callback_error( time_after(jiffies, cfg->retry_timeout + bp->b_first_retry_time)) goto permanent_error; + /* At unmount we may treat errors differently */ + if ((mp->m_flags & XFS_MOUNT_UNMOUNTING) && mp->m_fail_unmount) + goto permanent_error; + /* still a transient error, higher layers will retry */ xfs_buf_ioerror(bp, 0); xfs_buf_relse(bp); diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c index 677c3e0da472..7c05a22c1a73 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -681,6 +681,9 @@ xfs_mountfs( xfs_set_maxicount(mp); + /* enable fail_at_unmount as default */ + mp->m_fail_unmount = 1; + error = xfs_sysfs_init(&mp->m_kobj, &xfs_mp_ktype, NULL, mp->m_fsname); if (error) goto out; @@ -962,6 +965,7 @@ xfs_mountfs( cancel_delayed_work_sync(&mp->m_reclaim_work); xfs_reclaim_inodes(mp, SYNC_WAIT); out_log_dealloc: + mp->m_flags |= XFS_MOUNT_UNMOUNTING; xfs_log_mount_cancel(mp); out_fail_wait: if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) @@ -1013,6 +1017,14 @@ xfs_unmountfs( xfs_log_force(mp, XFS_LOG_SYNC); /* + * We now need to tell the world we are unmounting. This will allow + * us to detect that the filesystem is going away and we should error + * out anything that we have been retrying in the background. This will + * prevent neverending retries in AIL pushing from hanging the unmount. + */ + mp->m_flags |= XFS_MOUNT_UNMOUNTING; + + /* * Flush all pending changes from the AIL. */ xfs_ail_push_all_sync(mp->m_ail); diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h index 72ec3e3c988e..9063a9c7b2fe 100644 --- a/fs/xfs/xfs_mount.h +++ b/fs/xfs/xfs_mount.h @@ -177,6 +177,7 @@ typedef struct xfs_mount { */ __uint32_t m_generation; + bool m_fail_unmount; #ifdef DEBUG /* * DEBUG mode instrumentation to test and/or trigger delayed allocation @@ -195,6 +196,7 @@ typedef struct xfs_mount { #define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops must be synchronous except for space allocations */ +#define XFS_MOUNT_UNMOUNTING (1ULL << 1) /* filesystem is unmounting */ #define XFS_MOUNT_WAS_CLEAN (1ULL << 3) #define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem operations, typically for diff --git a/fs/xfs/xfs_sysfs.c b/fs/xfs/xfs_sysfs.c index 084a606840a1..4c2c55086208 100644 --- a/fs/xfs/xfs_sysfs.c +++ b/fs/xfs/xfs_sysfs.c @@ -381,6 +381,13 @@ to_error_cfg(struct kobject *kobject) return container_of(kobj, struct xfs_error_cfg, kobj); } +static inline struct xfs_mount * +err_to_mp(struct kobject *kobject) +{ + struct xfs_kobj *kobj = to_kobj(kobject); + return container_of(kobj, struct xfs_mount, m_error_kobj); +} + static ssize_t max_retries_show( struct kobject *kobject, @@ -447,6 +454,38 @@ retry_timeout_seconds_store( } XFS_SYSFS_ATTR_RW(retry_timeout_seconds); +static ssize_t +fail_at_unmount_show( + struct kobject *kobject, + char *buf) +{ + struct xfs_mount *mp = err_to_mp(kobject); + + return snprintf(buf, PAGE_SIZE, "%d\n", mp->m_fail_unmount); +} + +static ssize_t +fail_at_unmount_store( + struct kobject *kobject, + const char *buf, + size_t count) +{ + struct xfs_mount *mp = err_to_mp(kobject); + int ret; + int val; + + ret = kstrtoint(buf, 0, &val); + if (ret) + return ret; + + if (val < 0 || val > 1) + return -EINVAL; + + mp->m_fail_unmount = val; + return count; +} +XFS_SYSFS_ATTR_RW(fail_at_unmount); + static struct attribute *xfs_error_attrs[] = { ATTR_LIST(max_retries), ATTR_LIST(retry_timeout_seconds), @@ -462,6 +501,7 @@ struct kobj_type xfs_error_cfg_ktype = { struct kobj_type xfs_error_ktype = { .release = xfs_sysfs_release, + .sysfs_ops = &xfs_sysfs_ops, }; /* @@ -548,6 +588,12 @@ xfs_error_sysfs_init( if (error) return error; + error = sysfs_create_file(&mp->m_error_kobj.kobject, + ATTR_LIST(fail_at_unmount)); + + if (error) + goto out_error; + /* .../xfs/<dev>/error/metadata/ */ error = xfs_error_sysfs_init_class(mp, XFS_ERR_METADATA, "metadata", &mp->m_error_meta_kobj, |